<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>导航</title>
    <link rel="stylesheet" href="site.css">
    <link rel="stylesheet" href="https://cdn.staticfile.org/twitter-bootstrap/4.3.1/css/bootstrap.min.css">
    <script src="https://cdn.staticfile.org/jquery/3.2.1/jquery.min.js"></script>
    <script src="https://cdn.staticfile.org/popper.js/1.15.0/umd/popper.min.js"></script>
    <script src="https://cdn.staticfile.org/twitter-bootstrap/4.3.1/js/bootstrap.min.js"></script>
</head>
<body>
  <div class="jumbotron text-center">
    <h1>学生信息管理系统导航页</h1>
    <p>点击相应链接选择功能!</p> 
  </div>
   
  <div class="container">
    <div class="row">
      <div class="col-sm-3">
        <h3>
            <a href="add.html">增加数据</a>
        </h3>
        <p>在这里添加学生信息</p>
      </div>
      <div class="col-sm-3">
        <h3>
            <a href="delete.html">删除数据</a>
        </h3>
        <p>在这里删除特定的学生信息</p>
      </div>
      <div class="col-sm-3">
        <h3> 
            <a href="update.html">修改数据</a>
        </h3>
        <p>在这里可以修改学生数据</p>
      </div>
      <div class="col-sm-3">
        <h3> 
            <a href="query.html">查询数据</a>
        </h3>
        <p>点击查询学生信息</p>
      </div>
    </div>
  </div>
</body>
</html>